Originally advertisers would start the bidding for those keywords
at $.10. Now the minimum will be set mostly on two factors: the
previous click-through performance of the company bidding, and
the value of the keyword itself. Yahoo! says that the bid could
be higher or lower than $.10 based on the two factors.

So what does this mean? We’re not sure yet.
TechCrunchlinked to
some anecdotal evidence from advertisers who say their minimum
bids have doubled or quadrupled overnight. But that’s just a few
– and it doesn’t say anything about what the revenue implications
will be. Any Yahoo! advertisers out there affected by the change?
Let us know in comments.